2024-05-01 10:28 AM
can we use internal 24MHz clock for STM32H7A3VIH6Q host or we should use external? Maybe in the future we are going to use USB. Now, just UART and SPI, should I use external to support USB in the future?
2024-05-01 10:49 AM
For better precision (and low jitter) use external crystal. USB anyway needs it .
I recommend an oscillator (i use also) , no trouble with caps etc. ; today not much more expensive than a crystal and the caps.
And a damping resistor (51r) in the clock line, to avoid ringing.
Something like this: 520-2520MV-160-CNT
https://www.mouser.de/ProductDetail/ECS/ECS-2520MV-160-CN-TR?qs=byeeYqUIh0MIhToPrW09tg%3D%3D
or if you want 24 M : 520-2520MV-240-BN-T